摘要
采用微波辅助共沉淀法制备Sr(1-x)CO3:xTb3+绿色荧光粉,并利用SEM、XRD、PL-PLE等仪器分别对样品的形貌、物相和发光性能进行表征。结果表明,样品由片状和类球形组成,掺杂Tb3+作为发光中心进入到碳酸锶晶格中。该荧光粉的激发主峰位于231 nm处的4 f7→5d1宽带吸收;发射光谱的最强发射峰位于543 nm处,对应于Tb3+的5D4→7F5跃迁,属于绿色发光。研究Tb3+离子掺量对样品发光性能的影响,随着Tb3+离子掺杂浓度的增大,发光强度先增加后减小,最佳掺杂量x为3.5%。初步探讨Tb3+离子的浓度猝灭机理为交换相互作用。
The Tb^3＋-doped strontium carbonate phosphor was synthesized via co-precipitation route by microwave assisted.The phosphor powders were characterized by scanning electron microscopy（SEM）,X-ray diffraction（XRD） and photoluminescence and photoluminescence excitation（PL-PLE） spectrum.The results showed that Tb^3＋ acting as a luminescent center probed into the single orthorhombic phase of SrCO3 with flake-like and sphericity-like.The PLE spectrum showed a broadband absorption center in 231 nm,which belonged to 4f^7→5d^1 transition.The sample was the green phosphor since the maximum emission peak located in the vicinity of 543 nm,corresponding to the transition of 5D^4→7F^5.The luminescent intensities increased with increasing Tb^3＋ concentration,and then decreased because of concentration quenching.The optimal concentration of Tb^3＋ was 3.5 mol%.The concentration self-quenching mechanism is exchange interaction.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2011年第5期209-212,223,共5页
Journal of Sichuan University (Engineering Science Edition)
基金
国家自然科学基金资助项目(10976023)
西南科技大学研究生创新基金资助项目(09ycjj15)
四川省生物质工程技术研究中心资助项目(09zxbk09)
关键词
微波辅助
共沉淀法
碳酸锶
绿色荧光粉
microwave assisted
co-precipitation
SrCO3
green phosphor
